MQ-3 Gas Sensor

Product Code: Waveshare 9530

MQ-3 Gas Sensor
MQ-3 Gas Sensor

GST inclusive


Availability: 2 In Stock

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  • Sensitive for alcohol, ethanol
  • Output voltage boosts along with the concentration of the measured gases increases
  • Fast response and recovery
  • Adjustable sensitivity
  • Signal output indicator


  • Power: 2.5V ~ 5.0V
  • Dimension: 40.0mm * 21.0mm
  • Mounting holes size: 2.0mm


  • Car alcohol alarm
  • Breathalyser

How to Use

In the case of working with a MCU:

  • VCC ↔ 2.5V ~ 5.0V
  • GND ↔ power supply ground
  • AOUT ↔ MCU.IO (analog output)
  • DOUT ↔ MCU.IO (digital output)

Package Content

  • MQ-3 Gas Sensor × 1

  • 4-pin custom connector jumper wire × 1


Development resources: demo codes, schematic, datasheets, etc.

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